87 0 obj <> endobj xref 87 28 0000000016 00000 n Edit your locating an earthquake epicenter worksheet answers online. =Cv :~4yrXP 62{_,*Uq/O-oUNBr-$y~:G},#3e^CS6U*_zVGY7ZNUWk2f?? {%!,"{u5E&OOqA_"/uxn-kx+Vz*EQb)Q The uses of technologies and any limitations on their use are driven by individual or societal needs, desires, and values; by the findings of scientific research; and by differences in such factors as climate, natural resources, and economic conditions. Students first triangulate the location of an earthquake's epicenter, then calculate its magnitude. Add to Library. Finding the Epicenter. 0000001861 00000 n This worksheet focuses on using the p and s graph to find different variables. 2. https://people.wou.edu/~taylors/gs104/lab5key.pdf Locating Earthquake Epicenters | CK-12 Foundation Apr 8, 2020 . 0000098546 00000 n Figure 13.10). activity 4 locating an earthquake epicenter The Science of Earthquakes | U.S. Geological Survey An earthquake is what happens when two blocks of the earth suddenly slip past one . 15 Bill Nye - Earthquakes Worksheet Key Earthquakes occur when the big pieces of earth's crust, called plates, move a little. Sharing Information/Thinking Ahead: In the Evaluate section of the worksheet, student pairs are asked to compose answers to two questionswhether they think seismology is a reliable science and ways seismic data is useful for engineers. Considered best for measuring small earthquakes (3.5 M or less). Reading Strategy. Using this resource students find the arrival times of P-waves and S-waves using a seismogram. The point of origin of an earthquake is called its focus and the point on the Earth's surface directly above the focus is the epicenter. In Figure 13.9, there is an example seismogram from a station that includes a minor earthquake. The longer the time between the arrival of the P-wave and S-wave, the farther away is the epicenter. Pwaves have the greatest velocity and reach the, seismic station first. The spot where those three circles intersect is the epicenter (Figure 13.12). 0000010002 00000 n Students learn what causes earthquakes, how we measure and locate them, and their effects and consequences. 2. 12 Earthquake Location Lab Answer Key (PDF) - skislah.edu Web12-earthquake-location-lab-answer-key 1/1 Downloaded from skislah.edu.my on February 15, 2023 by guest 12 Earthquake Location Lab Answer Key Right here, we have countless ebook 12 Earthquake Location Lab Answer Key and collections to check out. The calculated distance from each seismometer to the earthquake is shown as a circle. What is the One seismogram indicates the distance to the epicenter. S waves. Figure 1 is a simplified example of a Find 23 millimeters on the right side of the chart and mark that point. activity illustrates how the epicenter of an earthquake is found. How do we determine the epicenter of an earthquake? Seismic stations detect earthquakes by the tracings made on seismographs. Apr 8, 2020 One seismogram indicates the distance to the epicenter. distance from transducer to the focal point. (Grades 0000001143 00000 n This page titled 13.4: Locating an Earthquake Epicenter is shared under a CC BY-SA license and was authored, remixed, and/or curated by Deline, Harris & Tefend (GALILEO Open Learning Materials) . 0000004769 00000 n Success is figuring out that the estimated magnitude is 5.9. m>r/Q[6 0000001396 00000 n For example, Introduction: Before student pairs look at the Earthquakes Living Lab, direct them to complete the Engage section of the Finding Epicenters and Measuring Magnitudes Worksheet, which asks them to apply any prior knowledge and/or speculate as to what the Richter magnitude scale is and what an epicenter is. minute apart, represent the passage of time What was the lag time (in minutes) at this location? 0000005544 00000 n (, Find the S-P interval for each seismogram and record answers in the S-P column of, Find the distance to the epicenter (in kilometers) from each recording station and record answers in Table 1. Students learn about the types of seismic waves produced by earthquakes and how they move through the Earth. 0000001746 00000 n Objective Use data from seismograms to locate the epicenters of earthquakes. A.45 seconds B.50 seconds C.55 seconds D.65 seconds Answer Key: D Engineers first determine where earthquakes are likely to occur, and how severe they are likely to be. What about P waves? Three seismographs are needed. Do limits exist on what science can predict? Three seismographs are needed. Click on New Document and select the file importing option: upload Locating the epicenter of an earthquake worksheet answer key from your device, the cloud, or a protected link. Scientists use triangulation to find the epicenter of an earthquake. Take a few minutes to read the information on the left side of this page for the 2010 earthquake off the coast of central Chile. The hypocenter is the point within the earth where an earthquake rupture starts. 5. focus - the point within Earth where an earthquake originates. Short for "secondary wave" or "shear wave." By looking at the time between the arrivals of the P- and S-waves, one can determine the distance to the earthquake from that station, with longer time intervals indicating longer distance. View Notes - Locating_an_epicenter_activity from SCIENCE Earth Scie at Toms River High North. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. The longer the time is between the P-and S-wave . Several thousand seismographs exist at locations around the planet, continuously measuring abnormalities in the Earth's movement. Most of these earthquakes are small tremors that cant be felt by people, but occasionally an earthquake occurs on a large magnitude that causes millions of dollars in property damage and kills hundreds to thousands of people. Earthquakes occur along faults, which are cracks in the Earths crust that build tension. Privacy Policy, Seismograms from seismic stations in Fresno, CA, Phoenix, AZ, and Las Vegas, NV, A modified travel time curve for S-P wave, A Modified Travel Time Curve for S-P Wave. Finding the epicenter worksheet answer key. 0000003855 00000 n Looking at the nomogram, students click on each location data point to see where the three lines intersect to read the estimated magnitude. determine the epicenter using the S P (S minus P) method. Follow this simple guide to edit Locating the epicenter of an earthquake worksheet answer key in PDF format online free of charge: Explore all the advantages of our editor right now! farther from the epicenter of an earthquake? %%EOF You can also download it, export it or print it out. This is determined by the P-and S-wave arrival times. S wave: The second seismic wave of an earthquake. Epicenter Location on Earth's surface directly above the focus of the earthquake 5. Richter scale Method of earthquake measurement based on the amplitude of seismic . Use Figure 4.5 and the travel-time graph in Figure 4.4 to determine the distance between each station and THREE SEISMOGRAMS the epicenter. Do you agree with this alignment? Download. Mr Gneiss. The period of P waves is shorter, than the period of surface waves. For this activity, select the "Chile" box. (Figure 3):. They use three seismographs in a process called triangulation to determine earthquake epicenters. Triangulation to Locate an Earthquake By Earthquake Hazards Original Thumbnail Medium Detailed Description Triangulation can be used to locate an earthquake. (Source: USGS). The farther away the epicenter is, the greater the difference . inch = 500 km. Draw your signature, type it, upload its image, or use your mobile device as a signature pad. What is an earthquake? The nations most famous fault is the San Andreas Fault, which runs along a north-south trend in southern California, and happens to run directly through Los Angeles. It is called triangulation because a triangle has three sides, and it takes three seismographs to locate an earthquake. What are those limits? Describe what the "magnitude" of an earthquake is. approximate period of the surface waves in seconds? Thanks for your feedback! Then locate and click the link in the center of the page under the question: "How is an earthquake epicenter located and how is magnitude determined"? ACTIVITY 4.2B Locating an Earthquake Figure 4.5 shows seismograms for the same earthquake recorded at three locations - New York, Nome, Alaska, and Mexico City. Subject Areas: Using historical seismographs, engineers forecast the strength or magnitude of earthquakes and make predictions and determine building codes and safety protocols. 0000106240 00000 n Earthquakes & Volcanoes Test Review Answers. Hand out the worksheets to the groups and direct them to read through the instructions. Cross), Give Me Liberty! directly above it on the surface of the earth is called the epicenter. Last updated November 26, 2013. Since the 1970s, the use of the Richter magnitude scale has largely been replaced in the scientific community by the moment magnitude scale (MMS). We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. (Grades 9 - 12). 0000000856 00000 n Earthquakes can also cause tsunamis, which are very large waves that can damage coastlines and put coastal residents in danger. Record your answer from Lab Exercise #2, Step 1. Great exercise for Regents Earth Science. pen recorded the arrival of P, S, and surface What types of engineers might use this data the most? 0000006011 00000 n 17 Station St., Ste 3 Brookline, MA 02445. A minimum of three seismic stations is necessary to locate an epicenter. Once three seismographs have been located, find the time interval between the arrival of the P-wave and the arrival of the S-wave. 0000103591 00000 n Direct students to finish the activity by completing the. epicenter, the longer the lag time measured To accurately locate an earthquake epicenter, records from three. earthquake - shaking and vibration of Earth's surface. Please answer the following questions using the earthquake video shake, shake, shake. 0000007097 00000 n Y$Kr;V6[;Dq vg~cx:A[^jCssupwD endstream endobj 80 0 obj <> endobj 81 0 obj <>stream 12), Evaluate ways that technology can impact individuals, society, and the environment. Thanks for your feedback! Accessed December 11, 2013. http://en.wikipedia.org/wiki/Moment_magnitude_scale, Novak, Gary.